Sprayer nozzle



Feb. 18, 1930.

N. .1. urQuHAR SPRAYER NOZZLE Filed April 11, 1 v

auoantoz [0mm (l Z/mWm z a: jam 4 4M- of Figure 1.

Patented Feb. 18, 1930 UNITED STATES PATENT OFFICE NORMAN J. URQUHART,OF DETROIT, MIOHIGAN, ASSIGNOR OF TWO-THIRDS TO HARRY W. THOMAS, OFDETROIT, MICHIGAN l SPRAYER NOZZLE Application filed April 11,

The invention relates to sprayer nozzles of that type more particularlydesigned for use in the spraying of fine granular solids or dust and theinvention consists in the 5 novel construction as hereinafter set forth.

- In the, drawings;

Figure 1 is a central longitudinal section through the sprayer nozzle.

Figure 2 is a cross section on line 2 -2 Figure 3 is an end elevationthereof.

Among the various uses of my improved nozzle are first the spraying ofpoison-dust over vegetation; second, the spraying of solid dust fuels incombustion furnaces. For the latter use it is essential that thequantity of solid fuel should be very accurately proportioned to thequantity of air in the current by which it is carried. It is alsonecessary to change the proportion where there is va' riation in fuelvalue or weight of solid material or to suit other conditions. Where thedevice is used for spraying dust in the open air it is desirable toavoid as far as possible deflection or obstruction of the stream byatmospheric movement. The means for accomplishing this is also a featureof my invention. In detail A is a T-shaped fitting which is connected bythe nipple B with a swivel head C on the stationary conduit 1). E is anozzle member having a threaded engagement with and projecting forwardfrom the fitting A, said member having atits rear end the flaring mouthF which connects with the sub-,

stantially straight passage G. At the rear of the fitting A is thenozzle member H which has a screw threaded engagement with said fittingpermitting of longitudinal adjustment therein. The member H has atapered forward end I which may be adjusted into the flaring mouth F orrearward therefrom. There is also the central air jet passage J whichconnects with an enlarged supply passage K. This is connected bythe-swivel fitting L with a valve casing M having a needle or othermetering valve N for regulating the quantity of air. The valve casing Mis connected to an air conduit 0 through-which 5c the air supply isconducted thereto. There 1927. Serial No. 182,841.

is also a lock nut P having a threaded engagement with the member H andadapted to lock the same in different positions of adjustment.

To concentrate the projected stream and v to impart thereto a greaterpower of penetration, the passage G through the member P is slightlytwisted. This will impart a rotation to the projected current which willprevent its deflection by atmospheric disturbo ances. I preferablyaccomplish this by making the passage G of slightly oval cross sectionwith a spiral twist from one end of the member E to the other.

With the construction as described, where the device is used inconnection with a combustion furnace the dust fuel is drawn into thefitting A through the conduit D by means of the suction produced by thejet from the nozzle H. The air for producing this jet is regulated bythe needle valve N in the valve fitting M and the proportionate quantityof dust fuel is obtained by adjusting the member H longitudinally towardor from the flaring mouth F of the member E. Thus the ratio between theair and the fuel may be made that best suited for complete combustion.

Where the device is used for the spraying of other dust materials suchas poisons, they are drawn in and discharged in the same so manner aspreviously described. The universal head C will permit of adjusting thenozzle so as to point in different directions and by reason of therifling or twisting of the barrel, the stream is concentrated so as toincrease its projective power and to avoid deflection of air currents.

When the nozzle member H is to be adjusted the lock nut P is firstloosened and the -member H then turned to screw it inward or v nozzlemember threaded to engage the oppotherein toward or from sald sitenipple of said fitting and adliustable first mentioned nozzle, theforward end of said jet nozzle corresponding to the taper of saidflaring mouth, an air conduit connected to said jet nozzle, ameteringtvalve for controlling air I supplied nected to the stem of theT-shaped fitting to the jet nozzle and a conduit conthrough which thedust is introduced by the suction of said jet and venturi.

In testimony whereof I affix my signature.

NORMAN J. URQUHART.

